CHP 1.3.1 released (fixes build problems)

Several people have let me know (in blog comments and emails — thanks!) that they were having trouble building CHP 1.3.0. Thanks for doing so — I was able to replicate the problem and have just released version 1.3.1 which should hopefully fix it. If it doesn’t, please send me more emails and comments! To upgrade using cabal, all you have to do is run: cabal update && cabal upgrade chp